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  #1  
Old 07-28-2014, 07:35 AM
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Question 91 or 98 RON For Aussie KL's ?

The specs don't show anything and I haven't asked the dealer yet - does a KL (Petrol) run on 91 or 98 standard ?
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  #2  
Old 07-28-2014, 06:07 PM
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Re: 91 or 98 RON For Aussie KL's ?

US owners manual shows:
Fuel Selection – 3.2L Engine 87-89 Octane
Fuel Selection – 2.4L Engine 87 Octane

Not sure how that relates to RON rating.
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Old 07-28-2014, 06:14 PM
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Re: 91 or 98 RON For Aussie KL's ?

Found this on line which should do the trick for you.
EURO RON MON US: (R+M)/2
90 83 86.5
92 85 88.5
95 87 91
96 88 92
98 90 94
100 91.5 95.75
105 95 100
110 99 104.5
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Old 08-11-2014, 04:32 PM
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Re: 91 or 98 RON For Aussie KL's ?

My last jeeps were 2007 & 2012 srt8 and i was hoping this 1 with the V6 i could save on gas by using 87 octane. There calling for 87/89 but so far i have used 87 & 91 and it looks like the 91 is winning so far but time will tell. Both my srt8 avg 13/14 intown and the 07 had a cai &tune and the 2012 was bone stock.
Well on my 1st tank the dealer filled it with 87 and all intown driving i got 18.80 mpg and the evic said 19.4. This time i filled it up with 91 and ill let you all know what i get doing the same type of driving. Ok i been driving it now for awhile and noticed with the 91 gas it seems to take off smother in auto mode and responds quicker. The evic is staying around the 22 mpg mark as with the 87 is was around the 19 mpg mark. Today im getting it waxed and claybared as this deep cherry color shows every little scraches. It just turned 300 miles so ill try and get a 0/60 time.
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Old 08-25-2014, 02:31 PM
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Re: 91 or 98 RON For Aussie KL's ?

There are two different tests for octane rating:
Research Octane Number (RON) and
Motor Octane Number (MON)

In the US the headline rating on the pump is the average of RON and MON.

In Australia the headline number is just the RON.

Australian regular unleaded 91 has minimum RON 91 and minimum MON 81 so the minimum average is 86.

Australian premium unleaded has minimum RON 95 and minimum MON 85 so the minimum average is 90.

Australian E10 is 90% regular unleaded with 10% ethanol.
The ethanol raises the RON to about 94 and the MON to about 83 so the minimum average is 88. Adding 10% ethanol also reduces the energy content by 3% which will typically increase fuel consumption by 2-3%

Higher octane petrol (gas) is required to prevent knocking/pinging/pre-ignition in high compression engines. This is the primary reason for vehicle manufacturers to specify premium.


The other difference is that regular (and E10) can contain more sulphur (150 ppm max) than premium (50 ppm max).

Lower sulphur may be required to be compatible with pollution control systems (especially catalytic converters). In Australia a vehicle manufacturer may may specify premium just because the vehicle needs the lower sulphur.

Premium 95 should meet the requirements of our V6 KL.
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Old 09-05-2014, 08:28 PM
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Re: 91 or 98 RON For Aussie KL's ?

My KL 3.2L says "Max 95 RON" on the cap
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Old 09-06-2014, 09:48 AM
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Re: 91 or 98 RON For Aussie KL's ?

Quote:
Originally Posted by RedDevil View Post
My KL 3.2L says "Max 95 RON" on the cap
I have never heard of a manufacturer specifying a maximum RON.
Are you sure it is not "Min 95 RON"?
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Old 09-07-2014, 05:18 AM
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Re: 91 or 98 RON For Aussie KL's ?

Good point...I just double checked this and counter to SWMBO's insistence that was what the dealer said, the manual says different.

Can't say I've seen 93 in Australia. 95 is what it gets, so at least SWMBO isn't putting just any fuel in it
Attached Images
File Type: jpg KL32RON.jpg (27.2 KB, 2 views)
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Old 09-07-2014, 08:39 AM
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Re: 91 or 98 RON For Aussie KL's ?

As I wrote in my earlier post, in Australia a manufacturer my recommend 95RON because of the lower sulphur content, not for the higher octane per se. If you go with the 95 you will get better performance, slightly better fuel economy, and the additional cost works out to about $200 a year.
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